Graft polymer and polyamide composition
CA 2047758 A1 · Owner: Bp Chemicals Limited · Inventors: Gallacher, Karen M.; Bonner, James G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A graft nitrile rubber contains up to 50 % by weight of maleic anhydride grafted thereon, preferably free radical melt grafted. The grafted nitrile rubber may be mixed in amounts up to 50 % by weight with a polyamide to form a composition of high impact strength especially at low temperatures.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed January 16, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 16, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 16, 2013.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.